Portable air compressor



FIG. 1 is a side view in elevation of a portable air compressor showingmy new design;

FIG. 2 is an opposite side view thereof;

FIG. 3 is a plan view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front view in elevation thereof; and

FIG. 6 is a rear view in elevation thereof.

The ornamental design for a portable air compressor, substantially asshown.